| /* |
| * Copyright 2016 The Bazel Authors. All rights reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.google.idea.blaze.base.lang.buildfile.formatting; |
| |
| import com.google.idea.blaze.base.lang.buildfile.lexer.BuildToken; |
| import com.google.idea.blaze.base.lang.buildfile.lexer.TokenKind; |
| import com.intellij.lang.BracePair; |
| import com.intellij.lang.PairedBraceMatcher; |
| import com.intellij.psi.PsiFile; |
| import com.intellij.psi.tree.IElementType; |
| import com.intellij.psi.tree.TokenSet; |
| |
| import javax.annotation.Nullable; |
| import java.util.Arrays; |
| |
| /** |
| * This adds a close brace automatically once an opening brace is typed by the user in the editor. |
| */ |
| public class BuildBraceMatcher implements PairedBraceMatcher { |
| |
| private static final BracePair[] PAIRS = new BracePair[] { |
| new BracePair(BuildToken.fromKind(TokenKind.LPAREN), BuildToken.fromKind(TokenKind.RPAREN), true), |
| new BracePair(BuildToken.fromKind(TokenKind.LBRACKET), BuildToken.fromKind(TokenKind.RBRACKET), true), |
| new BracePair(BuildToken.fromKind(TokenKind.LBRACE), BuildToken.fromKind(TokenKind.RBRACE), true) |
| }; |
| |
| private static final TokenSet BRACES_ALLOWED_BEFORE = tokenSet( |
| TokenKind.NEWLINE, |
| TokenKind.WHITESPACE, |
| TokenKind.COMMENT, |
| TokenKind.COLON, |
| TokenKind.COMMA, |
| TokenKind.RPAREN, |
| TokenKind.RBRACKET, |
| TokenKind.RBRACE, |
| TokenKind.LBRACE |
| ); |
| |
| @Override |
| public BracePair[] getPairs() { |
| return PAIRS; |
| } |
| |
| @Override |
| public boolean isPairedBracesAllowedBeforeType(IElementType lbraceType, @Nullable IElementType contextType) { |
| return contextType == null || BRACES_ALLOWED_BEFORE.contains(contextType); |
| } |
| |
| @Override |
| public int getCodeConstructStart(PsiFile file, int openingBraceOffset) { |
| return openingBraceOffset; |
| } |
| |
| private static TokenSet tokenSet(TokenKind... kind) { |
| return TokenSet.create( |
| Arrays.stream(kind) |
| .map(BuildToken::fromKind) |
| .toArray(IElementType[]::new) |
| ); |
| } |
| } |
| |